RADWIN 5000 HPMP User Manual
Release 3.1.00
9-6
External Lightning Surge Suppressors and Grounding
Chapter 9
The Transtector protection circuits shown in
Figure 9-5
below, utilize silicon avalanche diode
technology. The unit consists of an outdoor rated NEMA 3R type enclosure with easy mount-
ing flanges, ground stud attachment and easy wiring.
The ALPU-POE features RJ-45 protection circuits for the ODU-PoE data pairs (pins 1,2 & 3,6)
and DC power (pins 4,5 & 6,7 with the pairs bonded).
The unit is designed to be wall mounted. An optional set of bracket is available from the man-
ufacturer to allow a wide range of pole mount applications. A dedicated ground stud is pro-
vided inside the unit that must be bonded to the nearest grounding system (or Master Ground
bar) for proper surge protection.
The system wiring is installed with RJ-45 type connectors that can feed directly into the chas-
sis without having to cut, splice or route through awkward strain relief holes.
Figure 9-5: Transtector’s Surge Suppressor
To mount the lightning protection devices:
1. Mount the device as close to the ODU as possible. Mount the unit so that the cable
connectors are at the bottom (to prevent water from penetrating), with the strain
reliefs facing the ground.
2. Remove the cover by unscrewing the front of the unit.
3. Mount the unit to an outside surface using the two mounting holes.
4. Connect the ODU-PoE cable using the RJ-45 jack.
5. Connect one cable between the ODU and the suppressor using an RJ-45 jack.
6. Connect the suppressor’s ground stud to a grounding point. Use the appropriate wire
gauge and type, keeping the wire as short as possible, less than 1m (3’), between
the stud and the site grounding point.
7. Replace the cover.
Note
There may also be regulatory requirements to cross bond the ODU-PoE CAT-
5e cable at regular intervals up the mast. This may be as frequent as every
10 meters (33 feet).
